qgsmeshadvancedediting.h

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/***************************************************************************
  qgsmeshadvancedediting.h - QgsMeshAdvancedEditing
 
 ---------------------
 begin                : 9.7.2021
 copyright            : (C) 2021 by Vincent Cloarec
 email                : vcloarec at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSMESHADVANCEDEDITING_H
#define QGSMESHADVANCEDEDITING_H
 
 
#include "qgis_core.h"
#include "qgstopologicalmesh.h"
#include "qgstriangularmesh.h"
 
class QgsMeshEditor;
class QgsProcessingFeedback;
class QgsExpressionContext;

class CORE_EXPORT QgsMeshAdvancedEditing : protected QgsTopologicalMesh::Changes SIP_ABSTRACT
{
  public:
 
    QgsMeshAdvancedEditing();
    virtual ~QgsMeshAdvancedEditing();

    void setInputVertices( const QList<int> verticesIndexes );

    void setInputFaces( const QList<int> faceIndexes );

    QString message() const;

    void clear();

    virtual bool isFinished() const;

    virtual QString text() const;
 
  protected:
    QList<int> mInputVertices;
    QList<int> mInputFaces;
    QString mMessage;
    bool mIsFinished = false;

    virtual QgsTopologicalMesh::Changes apply( QgsMeshEditor *meshEditor ) = 0; SIP_SKIP
 
    friend class QgsMeshEditor;
};

class CORE_EXPORT QgsMeshEditRefineFaces : public QgsMeshAdvancedEditing
{
  public:
 
    QgsMeshEditRefineFaces();
 
    QString text() const override;
 
  private:
    QgsTopologicalMesh::Changes apply( QgsMeshEditor *meshEditor ) override;
 
    struct FaceRefinement
    {
      QList<int> newVerticesLocalIndex; // new vertices in the same order of the vertex index (ccw)
      QList<bool> refinedFaceNeighbor;
      QList<bool> borderFaceNeighbor;
      int newCenterVertexIndex;
      QList<int> newFacesChangesIndex;
    };
 
    struct BorderFace
    {
      QList<bool> refinedFacesNeighbor;
      QList<bool> borderFacesNeighbor;
      QList<bool> unchangeFacesNeighbor;
      QList<int> newVerticesLocalIndex;
      QList<int> edgeFace; //global index of the dirst face exposed on edge
    };

    void createNewVerticesAndRefinedFaces( QgsMeshEditor *meshEditor,
                                           QSet<int> &facesToRefine,
                                           QHash<int, FaceRefinement> &facesRefinement );
 
    bool createNewBorderFaces( QgsMeshEditor *meshEditor,
                               const QSet<int> &facesToRefine,
                               QHash<int, FaceRefinement> &facesRefinement,
                               QHash<int, BorderFace> &borderFaces );
 
    friend class TestQgsMeshEditor;
};
 

class CORE_EXPORT QgsMeshTransformVerticesByExpression : public QgsMeshAdvancedEditing
{
  public:
 
    QgsMeshTransformVerticesByExpression() = default;
 
    QString text() const override;

    void setExpressions( const QString &expressionX, const QString &expressionY, const QString &expressionZ );

    bool calculate( QgsMeshLayer *layer, QgsProject *project = nullptr );

    QgsMeshVertex transformedVertex( QgsMeshLayer *layer, int vertexIndex ) const;

    void setZFromTerrain( bool enable );
 
  private:
    QString mExpressionX;
    QString mExpressionY;
    QString mExpressionZ;
    QHash<int, int> mChangingVertexMap;
    bool mZFromTerrain = false;
 
    QgsTopologicalMesh::Changes apply( QgsMeshEditor *meshEditor ) override;
 
    friend class TestQgsMeshEditor;
};
 
#endif // QGSMESHADVANCEDEDITING_H